2 commits

Author	SHA1	Message	Date
Johannes du Plessis	fa147ce256	fix: fetch PR diff via GitHub API to re-enable add_finding validation (#1339) ... * reviewer: fetch PR diff via GitHub API to re-enable add_finding validation The previous hotfix in reviewer.py set diff_line_set=None because the sandbox-based diff prep was sometimes producing empty diffs. That made every bad anchor a publish-time 422 instead of a creation-time rejection — the agent burned tokens producing unanchorable findings, and we had to add a publish-time retry safety net (#1338) to clean up. Fetch the PR's unified diff via the GitHub REST API at reviewer startup and populate diff_text + diff_line_set so add_finding can reject bad anchors immediately. The API path is reliable and is the same diff GitHub validates against when posting inline review comments. If the fetch fails, fall back to the previous behavior (validation disabled, publish-time retry handles it). Also extract the PR-diff fetch into reviewer_diff.fetch_pr_diff so both reviewer.py and publish_review.py share one implementation instead of two copies. * reviewer: make diff_line_set validation side-aware compute_diff_line_set previously returned only new-side line numbers, so re-enabling add_finding's validation would wrongly reject findings with side=LEFT (deleted-line bugs whose only anchor is an old-side line). Return {file: {"RIGHT": {new_lines}, "LEFT": {old_lines}}} instead, and have is_range_in_diff select the matching side from the finding's recorded side. add_finding and publish_review's retry filter both pass the finding's side through.	2026-05-27 17:03:33 +00:00
Johannes du Plessis	378b95266e	feat: implement reviewer findings, publish_review, and watch mode (#1253) ... * feat: implement reviewer findings, publish_review, and watch mode Build out the reviewer agent end-to-end against the design in REVIEWER_DESIGN.md: - Findings as first-class state on the reviewer thread metadata (`agent/reviewer_findings.py`): Finding TypedDict with start_line/end_line ranges, suggestion text for ```suggestion blocks, github_review_comment_id for cross-run reconciliation, diff_hunk for UI rendering. Thread-level metadata gets `kind=reviewer`, `pr`, `last_reviewed_sha`, `watch` so a future frontend can list reviewer threads via the langgraph SDK. - Diff utilities (`agent/reviewer_diff.py`): parse_unified_diff, compute_diff_line_set for in-diff validation, extract_diff_hunk for caching the hunk on a Finding, compute_diff_in_sandbox for SHA-to-SHA diffs against the prepped repo. - Tools: `add_finding` (validates against the diff line set so out-of-diff ranges fail at creation, not at GitHub-publish), `update_finding`, `list_findings`, `publish_review`. The reviewer agent's tool list is swapped from `[]` (direct shell `gh api` calls) to these four. - Publish path (`agent/reviewer_publish.py` + `agent/tools/publish_review.py`): one POST /reviews call with body + inline comments + ```suggestion blocks, per-comment IDs stored back on findings, GraphQL `resolveReviewThread` fired for findings transitioning open->resolved on a re-review. - Reviewer graph: deterministic clone-or-fetch + checkout in the factory before the agent's first model call (warm- and cold-path symmetric); computed diff and in-diff line set passed via runnable config; system prompt rewritten for the single-evolving-findings model, severity ladder, in-diff-only discipline, and watch-mode reconciliation flow. - Watch mode in webapp.py: `push` event + `pull_request` closed/reopened added to supported events. New `process_github_push_event` resolves the open PR for the pushed branch, gates on the reviewer thread's `watch` flag, builds a re-review configurable, and triggers a run on the same canonical thread. `process_github_pr_close` toggles watch on closed/reopened. `set_reviewer_thread_metadata` is called on first review to install `kind=reviewer` + PR identity + watch=True. - Eval harness: target.py now extracts `add_finding` calls (mapped to the legacy {file, line, body, severity} shape the judge expects) and passes the right configurable so the prep step has base/head SHAs. - Tests: new unit suites for findings helpers, diff parsing, finding tools, publish rendering + GraphQL resolve, and watch-mode webhook handlers (push triggers re-review only when watching, idempotent on unchanged head SHA, PR close disables watch). Updated existing reviewer-webhook tests to mock `set_reviewer_thread_metadata`. - REVIEWER_EVAL_PLAN.md removed per user request; folded relevant context into REVIEWER_DESIGN.md. * fix(reviewer): correct git diff flags, scope, dedup, and review-comments URL Address PR #1253 review findings: - compute_diff_in_sandbox dropped the invalid `--no-prefix=false` flag (`option no-prefix takes no value` — every prep run was failing silently and the agent saw an empty diff). - compute_diff_in_sandbox grew a `merge_base` flag. First-review path now uses three-dot `base...head` (the merge-base diff GitHub renders on Files-changed) so we don't pick up changes that landed on the base branch after the PR diverged. Re-review delta keeps two-dot `last_reviewed_sha..head` since that's exactly the new commits. - publish_review skips findings that already carry `github_review_comment_id`. Without this, watched re-reviews re-posted every previously surfaced finding, and only the most-recent duplicate's id would later resolve when the issue got addressed. - fetch_review_comments URL now includes `{pull_number}` — `/repos/{owner}/{repo}/pulls/{pr_number}/reviews/{review_id}/comments` is the canonical endpoint; the old form 404s, so comment ids were never stored and watch-mode resolution couldn't run. Three new tests cover: three-dot vs two-dot wiring, no `--no-prefix` flag in the executed command, and that publish_review does not re-post findings whose `github_review_comment_id` is set. * fix(reviewer): default publish cap from 15 to 4 A clean PR with one critical issue padded out by three lower-severity findings is fine; fifteen is review spam. The agent can override per call when a PR genuinely warrants more.	2026-05-07 14:48:43 -07:00